package com.sky.service.impl;

import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;

import java.util.List;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

import static com.sky.constant.PasswordConstant.DEFAULT_PASSWORD;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void add(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //拷贝数据
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置密码初始都为123456
        String password =DigestUtils.md5DigestAsHex(DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);

        //设置账号状态，默认正常状态
        employee.setStatus(StatusConstant.ENABLE);

        /**
         * 设置创建时间和更新时间利用切面编程实现了
         */

        //设置创建时间
        //employee.setCreateTime(LocalDateTime.now());

        //设置更新时间
        //employee.setUpdateTime(LocalDateTime.now());

        //TODO设置
        //employee.setCreateUser(BaseContext.getCurrentId());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.add(employee);
    }

    @Override
    public PageResult selectAllEmployees(EmployeePageQueryDTO employeePageQueryDTO) {
        Long count = employeeMapper.total();

        long start= (employeePageQueryDTO.getPage()-1)*employeePageQueryDTO.getPageSize();

        List<Employee> employeeList= employeeMapper.selectAllByPage(start,employeePageQueryDTO);
        PageResult pageResult=new PageResult(count, employeeList);
        return pageResult;
    }

    @Override
    public void updateStatus(Integer status, Long id) {
        Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);

        employeeMapper.update(employee);
    }

    @Override
    public Employee selectEmployeeById(Long id) {
        Employee employee= employeeMapper.selectEmployeeById(id);
        employee.setPassword("****");
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO)
    {
        Employee employee=new Employee();

        BeanUtils.copyProperties(employeeDTO,employee);

        //employee.setUpdateTime(LocalDateTime.now());
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }


    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {
        passwordEditDTO.setEmpId(BaseContext.getCurrentId());

        //对旧的密码加密
        String oldPassword=passwordEditDTO.getOldPassword();
        oldPassword=DigestUtils.md5DigestAsHex(oldPassword.getBytes());

        String newPassword=passwordEditDTO.getNewPassword();

        //查询旧的密码与提供的旧的密码是否一致
        Employee employee= employeeMapper.selectEmployeeById(passwordEditDTO.getEmpId());
        String password=employee.getPassword();
        if(oldPassword.equals(password))
        {
            //对密码进行加密
            password=DigestUtils.md5DigestAsHex(newPassword.getBytes());
            employee.setPassword(password);
            employeeMapper.update(employee);
        }
        else
        {
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
    }
}
